Mark Andreas Sheppard (born 30 May 1964) is an English actor and musician. He is often credited as Mark A. Sheppard. Sheppard is known for playing the demon/King of Hell Crowley on Supernatural and for his recurring roles as lawyer Romo Lampkin on the Battlestar Galactica reboot, Interpol investigator James Sterling on Leverage, and small-time crime lord Badger on Joss Whedon's Firefly. Career Music The son of actor W. Morgan Sheppard and Regina Lisa ( Scherer) Sheppard, at age 15, Mark became a professional musician and enjoyed many years as a recording and touring artist with bands including Robyn Hitchcock, the Television Personalities and the Irish group Light a Big Fire. Mark played drums on Light a Big Fire's second album. As a session musician, he recorded albums for many groups throughout Europe, and eventually moved to Indonesia. Stage Sheppard starred in the American production of the play Cock and Bull Story (directed by Midnight Express author Billy Hayes), for which he won numerous awards, including the 1992 L.A. Drama Critics' Circle award, and the LA Weekly and Dramalogue awards. Television Sheppard's television work includes the following: the "Fire" episode of The X-Files, a year on the Jerry Bruckheimer action series Soldier of Fortune, guest-starring and recurring roles on The Practice, The Invisible Man, Special Unit 2, JAG, Star Trek: Voyager, The Chronicle, CSI: Crime Scene Investigation, CSI: NY, Monk, and Las Vegas, among others. He played a demon named Arnon on an episode titled "Witches in Tights" on the TV series Charmed. He played Badger, a semi-comical cockney-style crime boss in the short-lived Joss Whedon show Firefly and later cast again in another Whedon show, Dollhouse as Paul Ballard's dismissive FBI superior. He appeared as a villain in season five of the Fox show 24 and as Patricia Arquette's reincarnated Jack the Ripper-style serial killer nemesis on Medium. He appeared as Romo Lampkin in seasons three and four of Battlestar Galactica, and had a recurring role as Manservant Neville in ABC Family's short-lived The Middleman. He has been seen as Anthony Anthros on Bionic Woman, as Sterling the nemesis character on Leverage, as the King of Hell Crowley on Supernatural, and as bank robber Tom Prescott on an episode of Burn Notice. He appeared in the pilot episode of White Collar as a villainous master forger and as the Director of the Ring criminal organisation in Chuck. He appeared